To be fair, all Jean did was throw Lorna in the race, which is what she wanted to do to begin with before second-guessing herself. Jean didn't manipulate all of the mutants on Earth and S.W.O.R.D. to vote for her, which would have constituted meddling with a fair vote. Furthermore, Lorna could have reasserted her second impulse - i.e., to not join the team - at any moment.
I do understand people objecting to what Jean did, though.